docstr: In a disconnected graph the efficiency is 0
docstr_tok: ["In","a","disconnected","graph","the","efficiency","is","0"]
code: def test_local_efficiency_disconnected_graph(self):
      """
      In a disconnected graph the efficiency is 0
      """
      assert nx.local_efficiency(self.G1) == 0
  
file_path: networkx/networkx/algorithms/tests/test_efficiency.py
imports: import networkx
label_desc: Use image node_id 3 for calling the TestEfficiency obj's underlying member method code with example usage: obj.test_local_efficiency_disconnected_graph() without return types